Lipids are chemically a distinct group of substances, which are water insoluble. Fats, oils and other greasy compounds that are part of our diet are included in lipids. The commonly used term for lipids is fat. Like carbohydrates and proteins, lipids also contain carbon, hydrogen and oxygen. However, the ratio (77: 12: 1 1 approximately) differs. In addition to carbohydrates, lipids are the other basic fuel source and are highly concentrated (9.2 Kcal/gm) and give about twice the energy value of carbohydrates. Some food items are extremely rich in lipids. Lipids perform various functions in the body. Primarily it acts as a stored form of energy besides being important component of cell membranes. There are many health disorders associated with lipids.
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